Figure 1From: Genetics of coronary artery calcification among African Americans, a meta-analysis Power curves. Power curves calculated using QUANTO [32, 33] software, as described in the text. In brief, we specified a quantitative outcome, assumed an additive genetic model and used an effective sample size of 5,186 with the estimated mean and standard deviation of ln(CAC + 1). Allelic frequency variation did not affect the power estimates. We characterized the effect size as r2.Back to article page